Subtract 3/90 from 21/20
1st number: 1 1/20, 2nd number: 3/90
21/20 - 3/90 is 61/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
21/20 = 21 × 9/20 × 9 = 189/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
3/90 = 3 × 2/90 × 2 = 6/180 - Subtract the two like fractions:
189/180 - 6/180 = 189 - 6/180 = 183/180 - After reducing the fraction, the answer is 61/60
- In mixed form: 11/60
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